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- Compile without /dev/kmem access. This requires a small patch which
opens libkvm in a dummy mode which uses sysctls to implement most of
its interfaces rather than /dev/kmem access. This way we can drop the
dependency on /dev/kmem without rewriting existing code.
- Add a new snmpd user. Configure snmpd to drop privileges once it's
finished initialization.
- Remove the JAIL option. Now that snmpd avoids using /dev/kmem,
there's no need to have a special mode for running snmpd in jails.
The patch has been proposed upstream here:
https://sourceforge.net/p/net-snmp/mailman/net-snmp-coders/thread/ZjEwNV5BiTOQ-Adi%40nuc/#msg58766857
Approved by: zi
Sponsored by: Klara, Inc.
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D45031
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